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# How to find the mean absolute deviation

I have homework and i dont know how to find it so please

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Add all the numbers together to get the sum.
Divide the sum by the number of numbers to get the mean.
so you have
1,2,3,4, that is 10. divide ten by four. because there are 4 numbers.
you get 2.5. Take each number and subtract 2.5. Discard all the negatives from the pile. So in essence you are taking the above example and subtracting 2.5 from 3 and 4 because the other two are going to be negative. so the answer is 3 - 2.5 and 4 - 2.5 which is 2. then take that 2 and divide by the number of items that you subtracted from which is 2. 2/2 is 1. one is the mean standard deviation.

Posted on Apr 17, 2014

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Posted on Jan 02, 2017

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## Related Questions:

### How can I find the mean absolute deviation?

Mean absolute deviation.
Let's break it down into its components.
Mean - Average
Absolute - absolute value - sign doesn't matter - if negative, make positive
Deviation - difference from the mean

Let's do an example. Population 3 7 4 2. Total 16. Mean (Average) 16/4 = 4.

Deviations
3 - 4 = -1 absolute value 1
7 - 4 = 3
4 - 4 = 0
2 - 4 = -2 absolute value 2

Sum of these deviations 1 + 3 + 0 + 2 = 6
Mean (average) of these deviations is 6 / 4 = 1.5.

Good luck,

Paul

Apr 05, 2016 | Texas Instruments TI-30Xa Scientific...

### How do you find themean absolute deviation?

The mean is the arithmetic average, so add up all the numbers and divide by the number of numbers.

The standard deviation is a little more involved. The formula and example are explained here:
Standard Deviation Formulas

Good luck.

Paul

May 07, 2015 | Office Equipment & Supplies

### What is absolute deviation

It is a value of deviation regardless of sign. That is, negative deviations are considered along with positive deviations.

The classic definition of a deviation is the difference of a value from the standard, average or norm.

May 20, 2014 | The Learning Company Achieve! Math &...

### WHAT IS THE MEAN DEVIATION FOR 121 122 123 124 125 126?

Hello Dear

Mean deviation is calculated by the following steps:

1. Add all the numbers and then divide by total number of values. That is take a mean.
2. Then subtract the mean from each values and ADD them all
3. then the added answer must be divided by the total number of values. and you get the Mean devaition.

I solved your problem here in steps:

Step 1:
(121+122+123+124+125+126) / 6 Equals to 102.6

Step 2:

(121-102.6) + (122-102.6) ...... +(126-102.6)
=125.4

Step 3:

125.4/6 = 20.9 is the MEAN DEVIATION

Please dont forget to rate the solution.

regards

Mar 12, 2011 | Health & Beauty

### Standard deviation

standard deviation

calculate mean of a data set:

1. Turn calc. on or press MODE SeTUP
2.Press 3 for STAT
3. Press 1 for VAR
4.Enter values for X column
5. WHen done entering press SHIFT 1
6.Press 5
7.Press 2 to calculate the mean
8.Press =

Oct 05, 2008 | Casio FX-115ES Scientific Calculator

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